Abstract
We investigate an extension of the Standard Model with a second Higgs doublet, showing a two stage phase transition. Wash-out of a baryon asymmetry after the phase transition can be easily avoided in this class of models.B+L transitions are more strongly suppressed in the intermediate phase than in the high temperature symmetric phase, however. Therefore, it becomes more difficult if not impossible to generate a sufficient baryon asymmetry during the phase transition.
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Hammerschmitt, A., Kripfganz, J. & Schmidt, M.G. Baryon asymmetry from a two stage electroweak phase transition?. Z. Phys. C - Particles and Fields 64, 105–109 (1994). https://doi.org/10.1007/BF01557241
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DOI: https://doi.org/10.1007/BF01557241